EP1469109A2 - Kupplung zum Langsamlaufen und Schusssuchen mit verbessertem magnetischem Fluss und Verfahren zu ihrer Herstellung - Google Patents
Kupplung zum Langsamlaufen und Schusssuchen mit verbessertem magnetischem Fluss und Verfahren zu ihrer Herstellung Download PDFInfo
- Publication number
- EP1469109A2 EP1469109A2 EP04100257A EP04100257A EP1469109A2 EP 1469109 A2 EP1469109 A2 EP 1469109A2 EP 04100257 A EP04100257 A EP 04100257A EP 04100257 A EP04100257 A EP 04100257A EP 1469109 A2 EP1469109 A2 EP 1469109A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- toothing
- stator
- flat
- disc
- clutch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 230000004907 flux Effects 0.000 title description 4
- 238000007716 flux method Methods 0.000 title 1
- 230000008878 coupling Effects 0.000 claims abstract description 30
- 238000010168 coupling process Methods 0.000 claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 claims abstract description 30
- 238000009941 weaving Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/14—Driving, starting, or stopping arrangements; Automatic stop motions for reducing speed temporarily
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
- D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
- D03D51/085—Extraction of defective weft
Definitions
- the present invention relates to a slow-gear-selecting and pick-finding clutch mechanism in a weaving loom.
- it relates to a solenoid-controlled clutch mechanism and a manufacturing method therefor.
- the loom is sometimes equipped with an auxiliary motor which acts - through a suitable high-reduction-ratio kinematic chain - onto the shaft of the weaving machine and/or onto the loom main shaft.
- the auxiliary motor it is required that the auxiliary motor be engaged with the weaving machine only when the loom is running at low speed; in all other conditions of the loom the auxiliary motor should be disengaged.
- a device for selecting a slow-running gear is provided which couples the auxiliary motor to the weaving machine and/or to the main shaft only when it is explicitly required.
- pick-finding step The step in which, upon slow running of the loom, the relative phase between the main shaft and the weaving machine is correctly found out and established is called "pick-finding step", which shall be referred to in the following.
- Such a clutch device is for example the one described in the Italian application MI2000A/1157 and EP 1.245.707, in the name of the same Applicant, which will be incorporated here as reference.
- the mechanism comprises, amongst other things, two separate gears, with flat bevelled toothing, enclosing sandwich-wise a toothed and axially mobile disc meshing with the one or the other, according to suitable operation modes.
- the main shaft and the weaving machine shaft are co-axial and their ends lie opposite each other.
- Fig. 1 shows, in a cross-section, an example of prior art coupling.
- a flat bevelled toothed stator is opposite a toothed flange integral with the weaving machine shaft; a double-sided toothed disc is suitably attached to the end of the main shaft of the weaving loom, which passes through the stator.
- the disc is axially displaceable with respect to the shaft on which it is mounted, under the contrasting action of a membrane-and-thrust-spring assembly and of a solenoid.
- the latter is mounted integral with the stator case and through the stator develops a magnetic field that allows it to attract the toothed disc.
- Thrust springs are further provided, which press the toothed disc against the toothed flange, holding the coupling between the main shaft and the weaving machine.
- fig. 1 is a cross-section view, partially interrupted, of a prior art coupling device: in the top part, with the disc shifted to the left hand side, and in the bottom part, with the disc shifted to the right hand side;
- fig. 2 is a view similar to that of fig. 1 depicting a clutch according to the invention.
- fig. 3 is an elevation front view of the clutch portion depicted in fig. 2 with parts partially cut out.
- a clutch manufactured according to what has been cited before consists, in a manner known per se, of a stator 1 and of a toothed flange 2 between which a disc 3 is located.
- the stator 1 is fixed to the loom chassis and features a flat bevelled toothing 1a. At the same time it features a raised perimeter edge 1b ending with a circular rim surface 1b'.
- a flat bevelled toothing 2b is further provided on a flange 2, mounted at the end of a weaving machine drive shaft .
- the disc 3 features two series of front flat bevelled toothings: a first inner series 3a, intended to mesh with the corresponding toothing 1a of the stator 1, and a second outer series 3b, intended to mesh with the corresponding toothing 2b of the flange 2. Also, the disc 3 features a raised perimeter edge ending with a circular-rim surface 3b' intended to abutt with the surface 1b'.
- the disc 3 is mounted axially translatable at the end of a shaft A.
- the disc is mounted by means of membrane springs 4 and is constantly pushed to the left (with reference to the figure), i.e. meshed with the flange 2 (top part of fig. 1), by means of a series of springs 5, for example twelve springs arranged equally circumferentially spaced apart.
- stator 1 a coil E which acts as a solenoid is further provided to establish a magnetic field with the function of attracting to the right (with reference to the figure) the disc 3, overcoming the thrust of the springs 5, so as to cause the series of teeth 3a and 1a (lower part of fig. 1) to mesh with each other.
- the magnetic field is essentially toroidally-shaped around the solenoid.
- the magnetic flux is essentially circle-shaped around the solenoid E: hence it diffuses into the metallic material in a continuous way, except in the central area of the stator, i.e. at the teeth 1a and 3a, where - according to the prior art - a magnetic gap can be found (consisting of the clearance between the teeth) which significantly limits the effectiveness of the field.
- a pair of contact surfaces are instead provided partially levelling off the respective toothing.
- each tooth of the series 1a features a levelled-off area 1a', obtained radially outwards, which therefore creates a stubbling to the tooth 1a.
- each tooth of the series 3a features a levelled-off area 3a', located radially inwards, which creates another stubbling.
- undercutting grooves S are provided at the junction between the tooth relief and the levelled-off area.
- the two series of teeth can be drawn nearer into each other, bringing the levelled-off area 1a' into contact with the levelled-off ridge 3a'' of the tooth 3a.
- grinding of the surfaces 1b' and 3b' is carried out while grinding their respective toothing stubbling: by doing so, a perfect levelness is further achieved which guarantees optimal coupling.
- a contact coupling has hence been obtained, both inwardly and outwardly, radially to the solenoid, establishing a perfectly continuous closure of the toroidal magnetic circuit and achieving the desired results.
- the bevelled toothing can be obtained still by conventional tapping; subsequently it is possible to create the levelled-off areas 1a' and 3a' by mechanical machining. If carried out properly, this subsequent machining, amongst other things, may simultaneously result in an improved planarity of the contact surfaces in P, removing possible manufacturing inaccuracies which would have inevitably caused a functioning fault.
- this method for obtaining the coupling according to the invention is applicable also to clutches already manufactured according to the prior art, thus achieving a further object of those detailed in the preamble.
- the circumferential, perimeter portion of the teeth 1a on the stator 1 is removed by machining, for example by milling, obtaining a deep circumferential groove. Inside this groove, a ring is secured which represents an abutting surface against which the ridges 3a'' of the teeth 3a of the disc 3 are intended to engage, so as to achieve a similar closure of the magnetic circuit in the radially inner area. In this case too, the desired objects are fully achieved, although a different practical machining method is employed.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Paper (AREA)
- Characterised By The Charging Evacuation (AREA)
- Vehicle Body Suspensions (AREA)
- Coating With Molten Metal (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20030817 | 2003-04-18 | ||
IT000817A ITMI20030817A1 (it) | 2003-04-18 | 2003-04-18 | Innesto di marcia lenta e ricerca del passo a flusso |
Publications (4)
Publication Number | Publication Date |
---|---|
EP1469109A2 true EP1469109A2 (de) | 2004-10-20 |
EP1469109A3 EP1469109A3 (de) | 2005-03-23 |
EP1469109B1 EP1469109B1 (de) | 2008-09-03 |
EP1469109B9 EP1469109B9 (de) | 2009-08-12 |
Family
ID=32894176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04100257A Expired - Lifetime EP1469109B9 (de) | 2003-04-18 | 2004-01-26 | Kupplung zum Langsamlaufen und Schusssuchen mit verbessertem magnetischem Fluss und Verfahren zu ihrer Herstellung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1469109B9 (de) |
AT (1) | ATE407245T1 (de) |
DE (1) | DE602004016244D1 (de) |
ES (1) | ES2312923T3 (de) |
IT (1) | ITMI20030817A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3224759A1 (de) * | 1982-07-02 | 1984-01-05 | Maschinenfabrik Stromag Gmbh, 4750 Unna | Stirnzahnkupplung mit elektromagnetischer betaetigung |
DE3609404A1 (de) * | 1985-03-30 | 1986-10-02 | Zahnradfabrik Friedrichshafen | Elektromagnetkupplungen bzw. -bremsen mit elektrisch veraenderbarer haltekraft |
EP1158081A1 (de) * | 2000-05-25 | 2001-11-28 | Promatech S.p.A. | Antriebsvorrichtung für Webmaschinen ohne Schwungrad und Reibungskupplung |
EP1245707A1 (de) * | 2001-03-29 | 2002-10-02 | Promatech S.p.A. | Multipositionskupplung mit Blockiereinrichtung des beweglichen Elementes in einer Webmaschinenantriebsvorrichtung |
-
2003
- 2003-04-18 IT IT000817A patent/ITMI20030817A1/it unknown
-
2004
- 2004-01-26 DE DE602004016244T patent/DE602004016244D1/de not_active Expired - Lifetime
- 2004-01-26 ES ES04100257T patent/ES2312923T3/es not_active Expired - Lifetime
- 2004-01-26 EP EP04100257A patent/EP1469109B9/de not_active Expired - Lifetime
- 2004-01-26 AT AT04100257T patent/ATE407245T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3224759A1 (de) * | 1982-07-02 | 1984-01-05 | Maschinenfabrik Stromag Gmbh, 4750 Unna | Stirnzahnkupplung mit elektromagnetischer betaetigung |
DE3609404A1 (de) * | 1985-03-30 | 1986-10-02 | Zahnradfabrik Friedrichshafen | Elektromagnetkupplungen bzw. -bremsen mit elektrisch veraenderbarer haltekraft |
EP1158081A1 (de) * | 2000-05-25 | 2001-11-28 | Promatech S.p.A. | Antriebsvorrichtung für Webmaschinen ohne Schwungrad und Reibungskupplung |
EP1245707A1 (de) * | 2001-03-29 | 2002-10-02 | Promatech S.p.A. | Multipositionskupplung mit Blockiereinrichtung des beweglichen Elementes in einer Webmaschinenantriebsvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
EP1469109B9 (de) | 2009-08-12 |
ES2312923T3 (es) | 2009-03-01 |
EP1469109B1 (de) | 2008-09-03 |
EP1469109A3 (de) | 2005-03-23 |
DE602004016244D1 (de) | 2008-10-16 |
ATE407245T1 (de) | 2008-09-15 |
ITMI20030817A1 (it) | 2004-10-19 |
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